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<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
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<script>
$(document).ready(function(){
  
  $("#button1").click(function(event){
    return "Hello world!2";
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  $("#button1").click(function(event){
    return "Hello world!";
  });
  $("#button1").click(function(event){
    $("#p22").html(event.result);
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});
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	</head>
	<body>
<button id=button1 >点我显示 event.result</button>
<p id="p22" >这是一个段落。</p>

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